The 22-year-old tragically passed away yesterday after nearly six months in a coma.

According to a release from the Fulton County district attorney, the initial portion of her autopsy did not reveal any obvious cause of death, and showed no significant injuries to Bobbi's body.

The Fulton County Medical Examiner said that no cause of death would be determined until all tests are completed and "all investigative, medical, and other documentary records are received and thoroughly reviewed" – a process expected to take several weeks.

(Image: WENN)

This comes after it was reported that Bobbi's death would be the subject of a homicide investigation, with her boyfriend Nick Gordon remaining as a person of interest in the case.

Bobbi, the only daughter of Bobby Brown and Whitney Houston, was found unresponsive in a bathtub on January 31.

She was reported to have been found with injuries on her face and mouth.

Bobbi spent months in a medically-induced coma before being moved to hospice care in June.

Her father Bobby Brown said in a statement today: "Krissy was and is an angel. My family must find a way to live with her in spirit and honour her memory. Our loss is unimaginable. We thank everyone for the prayers for Krissy and our family as we mourn my baby girl."

Stars including Oprah Winfrey and Kylie Jenner took to Twitter to express their sadness over Bobbi's heartbreaking death.